Keyboard



FIG. 1 is a front perspective view of a keyboard, showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a front perspective view thereof, shown together with a representative tablet computer, in which the broken line showing of the table computer is for the purpose of illustrating environmental structure and forms no part of the claimed design; and,

FIG. 9 is a left side elevational view thereof, in which the phantom line showing of the key board in an alternate position is for illustrative purposes and forms no part of claimed design. 

The ornamental design for a keyboard, as shown and described. 